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Author Question: The covariance of two variables X and Y: a. must be between -1 and +1. b. must be positive. c. ... (Read 161 times)

drink

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on: Jun 24, 2018
The covariance of two variables X and Y:
 a. must be between -1 and +1.
  b. must be positive.
  c. can be any real number.
  d. None of these choices.

Question 2

If X and Y are random variables with E(X) = 6 and E(Y) = 9, then E(2X + 3Y) is:
 a. 39
  b. 15
  c. 27
  d. 12


ladyjames123

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Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

A


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drink

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Reply #2 on: Jun 24, 2018
Correct answers!


ladyjames123

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Reply #3 on: Jun 24, 2018
Great! Please up vote :D


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